Elemental Hero Chaos Neos (GLAS-EN036) - Gladiator's Assault Unlimited

"Elemental Hero Neos" + "Neo-Spacian Dark Panther" + "Neo-Spacian Glow Moss"This card can only be Special Summoned from your Fusion Deck by returning the above cards you control to the Deck (You do not use "Polymerization"). During the End Phase, return this card to the Fusion Deck, then Set all face-up monsters currently on the field. Once per turn, you can toss a coin 3 times and apply the appropriate effect:
- 3 Heads: Destroy all monsters your opponent controls.
- 2 Heads: This turn, the effects of all face-up monsters your opponent controls are negated.
- 1 Head: Return all monsters you control to their owner's hand."